The Sniper Rifle System 99 Anti-Matériel, (formally known as the Special Applications Rifle, Caliber 14.5 mm, SRS99),[3] is a sniper rifle produced by Misriah Armory and used by the UNSC Armed Forces. The SRS99 entered service with the Army in 2460. Because of its modularity and ongoing manufacturer support, the SRS99 was adopted by all branches in 2521.[3][1]

The SRS99 is a semi-automatic, gas-operated rifle that fires 14.5×114mm ammunition from a four-round detachable box magazine. The ejection port is on the right side of the weapon and the charging handle is on the left side. Unlike all other known models of the SRS99 series, this variant features a thumbhole stock instead of a pistol grip, and its body sports a black and navy blue finish in addition to the gray of its successors. The SRS99 is equipped with the Oracle N-variant scope,[1] which can display green outlines of objects when not in active use.

The SRS99 series/Gameplay is designed to be used at medium to long ranges and is equipped with an electronic scope for precisely this purpose. It is tremendously useful in its designated role, considering its extraordinary range, which surpasses any other weapon of comparable size, and its incredible stopping power even against body armor and Covenant shielding system.

In multiplayer, the SRS99 can be highly effective at close range in the hands of a skilled operator, as the highly damaging round is just as powerful at close range; a single round followed by a melee strike will kill a hostile almost instantly.

The rifle's projectile has a slight travel time at great distances, and requires practice to use effectively at range. When used in close quarters, its precision nature, slow reload time, small magazine capacity, heavy recoil, and slow rate-of-fire leave precious little room for error. A small combat load and the relative scarcity of ammunition available for the weapon also make it bad practice to expend ammunition on smaller, less threatening combatants, such as Grunts. Rounds fired by the SRS99 leave a trail that could be traced back to the sniper's location.

The weapon's reticule bloom has almost no effect on gameplay. However, its accuracy is not 100% perfect due to bloom. This can be proven by enabling the Bottomless Clip option in gametype settings, then firing the rifle as fast as possible. Eventually, the reticle will be fully expanded, proving that each shot is very slightly skewed.